The small-town drama “Three Billboards Outside Ebbing, Missouri” led the Screen Actors Guild nominations Wednesday with four nods, including Frances McDormand for best actress, while the racially charged horror film “Get Out” became a surprise contender for the best cast award, often seen as a predictor of the best picture Oscar.

The surprise snub: Steven Spielberg’s journalism drama “The Post,” starring Meryl Streep and Tom Hanks as top leaders of The Washington Post who risk their careers to publish the Pentagon Papers. The film received no nominations at all.

The SAG Awards, often considered a bellwether for the Oscars because actors are the largest voting bloc in the Academy, could boost a number of films that haven’t been considered major Oscar contenders. In addition to “Get Out” and “Three Billboards,” nominees for best cast also include the period drama “Mudbound” and Kumail Nanjiani’s romantic comedy “The Big Sick.” Greta Gerwig’s coming-of-age film “Lady Bird,” recently chosen as the year’s best film by the New York Film Critics Circle, was also nominated for best cast.

Meanwhile, Christopher Nolan’s critically acclaimed “Dunkirk,” widely seen as a best picture front-runner, received no acting nominations. It got one nod for best stunt ensemble alongside the action film “Baby Driver,” the superhero blockbuster “Wonder Woman” and two franchise finales, “Logan” and “War for the Planet of the Apes.”

In television, the leaders were HBO’s drama “Big Little Lies” and two Netflix offerings, the horror series “Stranger Things” and the sports-comedy “GLOW,” with four nods each.

The actor with the most nominations overall: Peter Dinklage, who earned ensemble nods for “Three Billboards” and HBO’s “Game of Thrones,” plus a solo acting nod in that series as the sharp-witted Tyrion Lannister.

Winners will be announced during a Jan. 21 telecast on TBS and TNT hosted by Kristen Bell. Morgan Freeman will be presented with the awards’ lifetime achievement honor.